.custom-black {
  background-color: black;
  color: #fff;

  .el-radio__input.is-checked + .el-radio__label {
    color: #fff !important;
  }
  .el-radio__input.is-checked .el-radio__inner {
    border-color: #fff;
  }
  .el-button--primary {
    border-color: #fff;
  }
}

.container{
  font-size: 18px;
  color: red;
  &-title{
    font-weight: bold;
    border: 1px solid green;
  }
}